/**
 * Render/response-time dedupe for the lossless truncation format (field
 * audit S4-1): when a summary was truncated at write time, its detail
 * begins with "Full summary: <full text>" where the full text extends the
 * truncated summary. Emitting both prints the same words twice — the field
 * measured roughly half of a warning-dense briefing, and 40/50 read
 * entries, as pure duplication. Guarded on the summary actually prefixing
 * the full text, so a caller-authored detail that merely starts with the
 * marker passes through untouched. Known miss (safe direction): a summary
 * containing a newline breaks the first-line comparison and falls back to
 * the old double render.
 */
export declare function dedupeFullSummary(summary: string, detail: string | undefined): {
    headline: string;
    detail: string;
};
/** Entry-shaped convenience: full text becomes the summary, the duplicated
 * first line leaves the detail. Applied in read/query/recent response
 * shaping (S4-1's read half; 2.16.0 pre-tag review ASC-2). */
export declare function dedupeEntryFullSummary<T extends {
    summary: string;
    detail?: string;
}>(entry: T): T;
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